|Information||5V, 15kV ESD, PROFIBUS RS485/RS422 Half-Duplex Transceiver|
|Supported Protocols||RS-422, RS-485|
|Supply Voltage (Nom) (V)||5|
|No. of Tx||1|
|No. of Rx||1|
|Data Rate (MAX) (Mbps)||20|
|HBM ESD (kV)||15|
|IEC 61000-4-2 Contact (±kV)||8|
|Transient Tolerance (V)|
|Fault Tolerance (V)|
|Temperature Range (°C)||-40 to 85|
|ICC (Max) (mA)||1|
|Typ Shutdown Current (µA)||1|
|PROFIBUS (5V) or High Output (3V)||✔|
SP1486E is a half duplex differential line transceiver suitable for high speed bidirectional communication on multipoint bus transmission lines. Each device contains one differential driver and one differential receiver. Devices comply with TIA/EIA-485 and TIA/EIA-422 standards and also meet the higher drive and tighter skew requirements of PROFIBUS applications. Lead-free and RoHS compli- ant packages are available for all models.
PROFIBUS is in wide use in industrial control and automation applications and the SP486E is ruggedized for use in harsh operating conditions. Receivers are specially designed to fail-safe to a logic high output state if the inputs are left un-driven or shorted. All RS485 bus-pins are protected against severe ESD events up to ±15kV (Air-Gap and Human Body Model) and up to ±8kV Contact Discharge (IEC 1000-4-2). Drivers are protected from excess current flow caused by bus contention or output short-circuits by both an internal current limit and a thermal-overload shutdown. Devices are rated for Industrial (-40 to +85oC) operating temperature. Receivers have exceptionally high input impedance, which places only 1/8th the standard load on a shared bus. Up to 256 transceivers may coexist while preserving full signal margin.
All devices operate from a single 5.0 V power supply and draw negligible quiescent power. Both driver and receiver can be enabled and disabled independently and the device enters a low power shutdown mode if both driver and receiver are disabled. The bus-pin outputs of disabled modules are in high impedance state. The high impedance driver output is maintained over the entire common-mode volt- age range from -7 to +12V.
- Optimized for PROFIBUS Network Applications
- Differential Output Voltage Exceed 2.1V ( 54Ω load)
- High Speed Data Rate - 20 Mbps
- Receiver failsafe on open, short or terminated lines
- 1/8th Unit Load, 256 transceivers on bus
- Hot Swap glitch protection on control inputs
- Driver short circuit current limit and thermal shutdown for overload protection
- 5.0V Single Supply Operation
- Ultra-low 400μA Quiescent Current
- 1μA shutdown mode
- Industry standard package footprints
- Robust ESD Specifications:
- ±15KV IEC1000-4-2 Air Gap and HBM
- ±8KV IEC1000-4-2 Contact Discharge
Documentation & Design Tools
|Data Sheets||SP1486E +5V, 20Mbps PROFIBUS RS485/RS422 Transceivers Advanced Failsafe, 1/8th Unit Load, ±15kV ESD-Protected||2.0.0||August 2022||1.3 MB|
|Application Notes||DAN-190, MaxLinear UARTs in RS-485 Applications||R01||July 2023||2.4 MB|
|Application Notes||AN-291, RS-485 Advanced Fail-Safe Feature||R01||May 2023||3.7 MB|
|Application Notes||RS-232 and RS-485 PCB Layout Application Note||R00||December 2022||2.8 MB|
|Application Notes||AN-292, RS-485 Cable Lengths vs Data Signaling Rate||R01||July 2022||2.7 MB|
|Application Notes||ANI-13, RS-485 and RS-422 Physical Topologies||D||December 2006||183.2 KB|
|Product Brochures||Interface Brochure||November 2023||3.7 MB|
Quality & RoHS
Parts & Purchasing
|Part Number||Pkg Code||Min Temp||Max Temp||Status||Suggested Replacement||Buy Now||Order Samples||PDN|
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
FAQs & Support
Search our list of FAQs for answers to common technical questions.
For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
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Submit a Technical Support Question As a New Question
For RS-232 it is 50 feet (15 meters), or the cable length equal to a capacitance of 2500 pF, at a maximum transmission rate of 19.2kbps. When we reduce the baud rate, it allows for longer cable length. For Example:
Baud Rate (bps)
Maximum RS-232 Cable Length (ft)
Fail Safe is an attempt to keep the output of the RS-485 receiver to a known state. Transceivers may have standard fail safe or advanced / enhanced receiver fail safe features. Standard fail safe supports open inputs while enhanced fail safe transceivers such as the SP339 and XR34350 support open input, shorted input and undriven terminated lines without external biasing. See Application Note ANI-22 for more detail.
The Parts & Purchasing section of the product page shows the Status of all orderable part numbers for that product. Click Show obsolete parts, to see all EOL or OBS products.
RS-485 Transceivers - Advance vs. Standard Failsafe
MaxLinear offers RS-485 transceivers with both standard and advanced receiver failsafe features. This video will show the main differences and advantages between advanced failsafe receivers and standard failsafe receivers in a typical RS485 installation
Tips to Maintain a Successful RS-485 Link
This video provides four tips to help maintain RS-485 serial communication without data loss